5.3 Making Salts From Solution Flashcards
What is the word equation for reacting an acid and an alkali?
Acid + alkali –> salt and water
How can we represent the neutralisation reaction of any acid and alkali?
H+(aq) + OH-(aq) –> h2o(l)
Why must we use an indicator to show when a neutralisation reaction is complete?
There is no visible change when acids react with alkalis
What is crystallisation?
When a salt is obtained from a solution by evaporating the water
What compound is produced in every neutralisation reaction?
Water
Name an alkali solution that doesn’t contain a metal
Ammonia solution
What is produced when ammonia reacts with acid?
Ammonium salts
What are ammonium salts used for?
Fertilisers
How can we make insoluble salts?
Mixing solutions of soluble salts that contain the ions needed
What is a precipitate?
An insoluble solid formed by a reaction taking place in solution
Name an example of an insoluble salt that can be made from mixing two soluble salt solutions and what happens?
We can make lead iodide (insoluble salt) by mixing solutions of lead nitrate and potassium iodide. The lead iodide forms a precipitate that can be filtered from the solution, washed with distiller water and dried
What is precipitation?
The removal of pollutants, like metal ions, from water. The water is then treated by adding substances that react with the pollutant metal ions dissolved in the water to form insoluble salts
Name a use of precipitation
Removing metal ions from industrial waste
Zinc carbonate is insoluble in water. What would happen when sodium carbonate solution is added to zinc sulfate solution?
Zinc carbonate would be produced as a precipitate or solid, sodium sulfate would remain in the solution
How can we make soluble salts?
Reacting an acid and an alkali
